Dust collector



Nov. 22, 1927. 1,650,292

H. MISCAMPBELL DUST COLLECTOR Filed Deo. '7. 1925 31a/vento@ HUGH M/JGAMPBFLL,

atbozmg drator;

Patented Nov. 22, 1927.

uNiTED STATES HUGH: MISCAIIIPBELL, OFYDULUTH, MINNESTA.

:DUST ootnncron. l

' Application filed December 7, 1925. Serial No. 73,628.

his invention relates to 'dust collectors and has particular reference to such a device for application to a lime hydrator. L

In the hydration oflnie intense heatv is created resulting in a large proportion of the` lighter andiinerparticles of lime being carried ofi1 by the draft in the stack of the hydrator', and it 'is the principal object of this invention to prevent the escape ofthese valuable products during the hydration process.

@ther minor objects and `advantages of Ythe invention will appear in the further description thereof.

Referring now to the accompanying drawing, forming part of this application, and in which like reference characters yindicate like parts:

Figure 1`is a side elevation of the dust collector, partly broken away and partly shown in section, as applied to a lime hy- Figure 2 is an enlarged fragmental sectional view of the horizontal spray pipe; and i Figure ,3 is a cross sectional view of the spray pipe showing the spray nozzle.

The hydrator is diagrammatically show n at 1, it having the cone shaped cap 2 di rectly thereover which forms the base of the stack in which the dust collector is housed. In ordinary installations it is the usual practice to have the hydrator proper placed on a lower ioor of the' building, and the stack 8 extend from the hydrator up through the next adjacent upper floor where it is turned horizontally for a short distance as at 4, and then again turned to a ver. tical as at 5 and on out throughthe building to the atmosphere; it being obvious that the steam, gases, and other products resulting from the hydrating process, pass out through this stack. y A

My improved dust collector is preferably installed within this horizontal section 4 of the stack and the same consists of the axially disposed hollow water supply pipe 6, which is supported within said section in any desired manner, as for example by the Journals 7, each of which is suppliedv with an oil pipe 8, accessible from thevexterior of the stack. Spaced equi-distant longitudinally of the pipe 6 are a plurality of vertically disposed pipes 9, they being hollow and` communicating with the interiork of the pipe 6. At the extreme end of each of these pipes 9 is fixed a spray nozzle such as illustrated at water suppl 1o, a being provided wat die adjusting yscrew 11 for vregulating the spray and the l setscrew 12 for holding the screw 11.in any desired set position. A fan 13 is also mounted upon the pipe 6 which may be used for the urpose yof creating additional draft VWithm the stack, or retarding the natural dra-ft therein, depending upon which wa the 'bladesof the fan are turned. The sha t or pipe 6 passes out through a dust and water tight packing 14 and into the adjacent tank being s own at '16,' and a discharge for drainingthe tank when necessary at 17 con trolled by the valve 18. There is also a shut oil valve shown at 19 inthe pipe 6 adjacent vthe tank 15 `so that waterfrom the vtank may be prevented fromentering the pipe 6- when desired. Upon the shaft 6 is installed the pulley 20, about which is the belt 21 to and about the pulley 22 of the motor 23 for supplying power and rotating the shaft 6.

The horizontal section 4 of the stack is preferably corrugated as clearly illustrated and in the bottom of each corrugation is drilled a relatively small hole 24.

Thus when the tank 15 is filled with water and the valve 19 opened thewater will flow' longitudinally` of the shaft 6 through the pipes 9, and in the form of a spray out through the nozzles 10, the same making a cloud of mist withinthe horizontal corrugated section of stack 4. If there is not enough pressure in the tank 15 to cause the .spray nozzles to properly function, the motor 23 may be caused to operate thus revolving the shaft 6 and nozzles at any desired predetermined speed as circumstances may require thereby causing the water to be forced out the nozzles at the required pressureby vcentrifugal force. Consequently when, durtank 15, the intake to saidv vso ing the hydra-ting process, the finer and more valuable particles of the limey are carried up i the stack by the draft, they must traverse thisucloud of inist resulting in their being precipitated and falling to the bottom of ioo the section 4 of the stack and running out with thev water' through the holes 24 andy falling into-the tank 25 installed in any desired manner' directly therebelow. In one'.

extreme end of this tank 25 there is fixed the pipe 26 which communicates with the products in the tank is above the upper end of the transverse baliie 29 installed adjacent the pipe 28. products rising from the hydrator through the stack are caught by the dust collector and returned to the hydrator with the Water 4for initially hydrating the lime.

I have also shown at 30 an obliquely disposed bafl'le secured Within the stack 5 vto further retard the dust in its attempt to pass out of the stack with the draft, and at 31 there is illustrated a dust tight door through Which access may be had toV the interior of the stack for any desired purpose.

From the foregoing` it is evident that I have produced an efiicient andl practical dust collector for hydrating or other machines, and it is obvious that various modifications may be resorted to without departing from the spirit of the invention.v v

Having thus described one embodiment of my invention what I claim and desire to secure by Letters Patent is:

l. In combination a dust discharging stack having an oset therein, the offset vportions of said stack being connected by a circum- It is thus obvious that theV ferentially corrugated, horizontally disposed, section of pipe, a hollovs7 shaft suspended Within 'said horizontal section having radially disposed arms discharging directly offset oortions of a hollow Water condu'ctinoshaft mounted within said horizontal sect-ion and extending outboard of the stack for connection with operating mechanism, and

means mounted upon the shaft for spraying the water directly against the inner surface of the horizontal section, and means carried by the shaft for regulating the draft through the horizontal sect-ion for the purpose described.

In testimony whereof I hereunto aflix my signature.

HUGH MIsoAMPBELL. 

